View Linux system version information and modify DNS address methods

It is possible that we installed the Linux system for a long time, perhaps through a number of user handover, to our hands when we do not know what this VPS is installed system, if the system is not clear to use the command, etc. are not the same. So we need to know what the VPS system is before we operate the command.

First, view the Linux VPS system approach

Cat/etc/redhat-release

Use the command above, and then get the system version of the system.

Here the old Chiang test to the system is the CentOS 5.10 version.

If we still need to see the kernel version, 32 or 64, then use the following command

Uname-a

You can see the old Chiang this machine is a 32-bit system.

Second, modify Linux DNS

There are times when the default Linux system uses DNS instability and we need to modify other third party stable DNS.

Execute vi/etc/resolv.conf

Then we'll see the VPS system default DNS and then modify the DNS services we need

The corresponding format modification is saved and then restarted to take effect.